1 /*
2 * Copyright (c) 2015-2016 MediaTek Inc.
3 * Author: Houlong Wei <houlong.wei@mediatek.com>
4 * Ming Hsiu Tsai <minghsiu.tsai@mediatek.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16 #include "mtk_mdp_core.h"
17 #include "mtk_mdp_vpu.h"
18 #include "mtk_vpu.h"
19
20
vpu_to_ctx(struct mtk_mdp_vpu * vpu)21 static inline struct mtk_mdp_ctx *vpu_to_ctx(struct mtk_mdp_vpu *vpu)
22 {
23 return container_of(vpu, struct mtk_mdp_ctx, vpu);
24 }
25
mtk_mdp_vpu_handle_init_ack(struct mdp_ipi_comm_ack * msg)26 static void mtk_mdp_vpu_handle_init_ack(struct mdp_ipi_comm_ack *msg)
27 {
28 struct mtk_mdp_vpu *vpu = (struct mtk_mdp_vpu *)
29 (unsigned long)msg->ap_inst;
30
31 /* mapping VPU address to kernel virtual address */
32 vpu->vsi = (struct mdp_process_vsi *)
33 vpu_mapping_dm_addr(vpu->pdev, msg->vpu_inst_addr);
34 vpu->inst_addr = msg->vpu_inst_addr;
35 }
36
mtk_mdp_vpu_ipi_handler(void * data,unsigned int len,void * priv)37 static void mtk_mdp_vpu_ipi_handler(void *data, unsigned int len, void *priv)
38 {
39 unsigned int msg_id = *(unsigned int *)data;
40 struct mdp_ipi_comm_ack *msg = (struct mdp_ipi_comm_ack *)data;
41 struct mtk_mdp_vpu *vpu = (struct mtk_mdp_vpu *)
42 (unsigned long)msg->ap_inst;
43 struct mtk_mdp_ctx *ctx;
44
45 vpu->failure = msg->status;
46 if (!vpu->failure) {
47 switch (msg_id) {
48 case VPU_MDP_INIT_ACK:
49 mtk_mdp_vpu_handle_init_ack(data);
50 break;
51 case VPU_MDP_DEINIT_ACK:
52 case VPU_MDP_PROCESS_ACK:
53 break;
54 default:
55 ctx = vpu_to_ctx(vpu);
56 dev_err(&ctx->mdp_dev->pdev->dev,
57 "handle unknown ipi msg:0x%x\n",
58 msg_id);
59 break;
60 }
61 } else {
62 ctx = vpu_to_ctx(vpu);
63 mtk_mdp_dbg(0, "[%d]:msg 0x%x, failure:%d", ctx->id,
64 msg_id, vpu->failure);
65 }
66 }
67
mtk_mdp_vpu_register(struct platform_device * pdev)68 int mtk_mdp_vpu_register(struct platform_device *pdev)
69 {
70 struct mtk_mdp_dev *mdp = platform_get_drvdata(pdev);
71 int err;
72
73 err = vpu_ipi_register(mdp->vpu_dev, IPI_MDP,
74 mtk_mdp_vpu_ipi_handler, "mdp_vpu", NULL);
75 if (err)
76 dev_err(&mdp->pdev->dev,
77 "vpu_ipi_registration fail status=%d\n", err);
78
79 return err;
80 }
81
mtk_mdp_vpu_send_msg(void * msg,int len,struct mtk_mdp_vpu * vpu,int id)82 static int mtk_mdp_vpu_send_msg(void *msg, int len, struct mtk_mdp_vpu *vpu,
83 int id)
84 {
85 struct mtk_mdp_ctx *ctx = vpu_to_ctx(vpu);
86 int err;
87
88 if (!vpu->pdev) {
89 mtk_mdp_dbg(1, "[%d]:vpu pdev is NULL", ctx->id);
90 return -EINVAL;
91 }
92
93 mutex_lock(&ctx->mdp_dev->vpulock);
94 err = vpu_ipi_send(vpu->pdev, (enum ipi_id)id, msg, len);
95 if (err)
96 dev_err(&ctx->mdp_dev->pdev->dev,
97 "vpu_ipi_send fail status %d\n", err);
98 mutex_unlock(&ctx->mdp_dev->vpulock);
99
100 return err;
101 }
102
mtk_mdp_vpu_send_ap_ipi(struct mtk_mdp_vpu * vpu,uint32_t msg_id)103 static int mtk_mdp_vpu_send_ap_ipi(struct mtk_mdp_vpu *vpu, uint32_t msg_id)
104 {
105 int err;
106 struct mdp_ipi_comm msg;
107
108 msg.msg_id = msg_id;
109 msg.ipi_id = IPI_MDP;
110 msg.vpu_inst_addr = vpu->inst_addr;
111 msg.ap_inst = (unsigned long)vpu;
112 err = mtk_mdp_vpu_send_msg((void *)&msg, sizeof(msg), vpu, IPI_MDP);
113 if (!err && vpu->failure)
114 err = -EINVAL;
115
116 return err;
117 }
118
mtk_mdp_vpu_init(struct mtk_mdp_vpu * vpu)119 int mtk_mdp_vpu_init(struct mtk_mdp_vpu *vpu)
120 {
121 int err;
122 struct mdp_ipi_init msg;
123 struct mtk_mdp_ctx *ctx = vpu_to_ctx(vpu);
124
125 vpu->pdev = ctx->mdp_dev->vpu_dev;
126
127 msg.msg_id = AP_MDP_INIT;
128 msg.ipi_id = IPI_MDP;
129 msg.ap_inst = (unsigned long)vpu;
130 err = mtk_mdp_vpu_send_msg((void *)&msg, sizeof(msg), vpu, IPI_MDP);
131 if (!err && vpu->failure)
132 err = -EINVAL;
133
134 return err;
135 }
136
mtk_mdp_vpu_deinit(struct mtk_mdp_vpu * vpu)137 int mtk_mdp_vpu_deinit(struct mtk_mdp_vpu *vpu)
138 {
139 return mtk_mdp_vpu_send_ap_ipi(vpu, AP_MDP_DEINIT);
140 }
141
mtk_mdp_vpu_process(struct mtk_mdp_vpu * vpu)142 int mtk_mdp_vpu_process(struct mtk_mdp_vpu *vpu)
143 {
144 return mtk_mdp_vpu_send_ap_ipi(vpu, AP_MDP_PROCESS);
145 }
146